How to use the Mortar Calculator

Estimate masonry mortar volume and bag count using adjustable usage and yield assumptions.

Calculation formula

Mortar cubic feet = unit count × mortar volume per unit × (1 + waste%); bags = ceil(cubic feet ÷ yield per bag).

Recommended steps

1. Enter values using the units shown beside each field.
2. Review whether the example assumptions match your situation.
3. Run the calculator and compare the key metrics.
4. Use the source data or official rates when precision matters.

Known limitations

Joint width and unit design dramatically affect mortar consumption; use manufacturer yields and job-specific rates.